San Francisco Marathon 10K: Sarah Cook Dominates the F40-44 Field

• Sarah Cook, 43, wins in 44:39 — a 7:11/mi pace that put nearly 7 minutes of clear air between her and the rest of the F40-44 field.
• Tight podium battle: Christina Hom (2nd, 51:25) and Katherina Andrade (3rd, 52:37) were separated by just 1:12, with Judith Blanco Jallurana (4th, 52:45) only 8 seconds further back.
• Positions 5–8 compressed into 20 seconds: Marcela Chavarria (5th, 53:26), Jessica Peisch (6th, 53:36), Annika Malik (7th, 53:54), and Katy Geisert (8th, 54:14) ran one of the tightest mid-pack clusters in the 125-woman field.
• Consistent depth: the 20th finisher, Tina Hsu, crossed in 58:43 — meaning the top 20 of 125 finished within a 14-minute window.

Under overcast San Francisco skies and cool, humid conditions, Sarah Cook of Walnut Creek made the F40-44 race her own from the gun. Her 7:11/mi average was in a different gear entirely from the rest of the field — runner-up Christina Hom of Berkeley came home in 51:25 at 8:16/mi, meaning Cook's margin of victory was an emphatic 6:46. In a 10K, that's not a close race; that's a statement.

Behind Cook, the real drama unfolded in the fight for second through fourth. Hom held on for the silver at 51:25, with Andrade (Alameda, 52:37) and Blanco Jallurana (Santiago, 52:45) pressing hard. Just 1:20 covered those three positions — a genuine battle that likely went down to the final mile.

The mid-pack was equally compelling. Five through eight — Chavarria, Peisch, Malik, and Geisert — were packed into a 48-second window across 53:26 to 54:14, a stretch of racing where any one of them could have swapped places with a single strong push. Ma Lourdes Manalastas (9th, 55:17) and Christi Pletcher (10th, 55:44) rounded out the top ten, both running controlled 8:50s-range paces on a course that, even at 55°F and 93% humidity, demanded respect.

Cook's win stands as the clear headline, but the depth of this 125-woman field — with competitive racing stacked from 2nd through 20th and beyond — made the F40-44 race one of the more compelling brackets on the morning.